Damper-controlling mechanism.



H. WILGUS.

DAMPER CONTROLLING MECHANISM.

APPLICATION FILED JUNE 10, 1914.

1,1 37,369, Patented Apr. 27, 1915.

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DAMPER CONTROLLING MECHANISM.

APPLICATION FILED IUNE 10, I914.

Patented Apr. 27, 1915.

3 SHEETSSHEET 2.

Early li ig us THE NORRIS PETERS CO., PH0TO-LITHOH WASHINGTON. D. c

H. WJLGUS.

DAMPER CONTROLLING MECHANISM.

APPLICATION FILED JUNE 10, 1914.

1,137,369. Patented Apr. 27, 1915.

3 SHEETS-SHEET 3.

Zfwftmw EWW f UNITED sTATEs PATENT orricn T HARRY wILGUs, on PHILADELPHIA, PENNSYLVANIA.

', l nAMPEn-ooNTRoLLINe MECHANISM.

To all whom it may concern:

Be it known that I, HARRY WILGUS, a

citizen of the United States, residing at Philadelphia, in the county of Philadelphia have inventedv have been operated intents and purposes constantly moving. In other words, a

-turecauses the damper 0 immediatelymove,

' stat will cause the damper to move but the damper'will remain in the position to wh ch and hence there is no uniformity of temperature because of this fact. With my improvements, the movement of the thermoit is moved until the thermostat operates within a pre-determined degree. A further object is to provide improvementsof the character stated which permit the parts to be adjusted to control the temperature'with in any desired limits, and which prevent sudden changes of temperature butinsure a uniformity of temperature within the'pre scribed elements. 3

With these and other objects in view, the

invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims. I

In the accompanying drawings: Figure 1 is a perspective view illustrating my improvements in connection with an incubator.

Fig. .2 is a view in cross section on the line 22 of Fig. 1. Fig. 3 is a view in elevation on an enlarged scale illustrating my improved arrangement of pawls and racks with which they engage. Fig. 4 is a View similar to Fig. 3 with parts removed to illustrate details back of the same. Fig. 5' is a view Specification of Letters Patent.

slight variation in 1 temperain section on the line 55 of Fig. "3. Fig.

6 is a view in section on the line 6-6 of i K Fig. 3. Fig. 7 is a view in section on the v Patented Apr. 2'7, 1915. Applicatien filed June 10, 1914. Serial No. 844,134.

line 77'of Fig. 3. Fig. 8 is aview in section on'the line 8 8 of Fig. 3, and Fig. 9

is a faceview of theconcentric racks.

1 represents an incubatonand 2 a heater of any approved'construction having a damper 3 to control the temperature within the lncubator 1.'

My improved damper controlling mechaif nism is located on top of the incubator, and] the several parts thereof are supported by a frame 4 which is secured'by screws 5 to the top of the incubator. This frame 4, at one end, is provided with three uprights 6, 1n which screw bearings-7 are located for pivotally supporting two levers 8 and 9. The particular manner of supporting these levers may, of course, be varied, but I preferably employ screw bearings to allow them to be adjusted to properly position them relative-to the cooperating features of the mechanism.

v To one end of'the lever 8, which Ishall V hereinafter refer to as the damper leverj? the damper 3 is connected, and'on the other end of the said lever 8,'a weight 10 is supported, and is rendered adjustable by reason of'the fact that it is provided with a screwthreaded openmg engaging'a screw-threaded end of the lever. A similar weight 11 is ad ustable on one end'of lever 9, so that by means ofthese weights 10 and 11, the two levers may" be nicely balanced and permit] "the parts to be easily moved.

12 represents a rod which extends throughv the top of the incubator, and is to be connected to any ordinary thermostat. This rod projects through a block 13 in a yoke 14,

said yoke being pivotally connected at its upper end to the lever 9.

A set screw 15 isprovided in the block 13,

and is adapted to lock the rod 12 to the yoke. On the damper lever '8, I secure a block 16 having on one face two ratchet racks 17 and 18 respectively. The teeth of these racks are oppositely beveled, and said racks are curved slightly and are concentric with the pivot or fulcrum of the lever. The block 16lies back of an upright plate 19 fixed to frame 4, and this plate 19 has 35 dog 34- has its beveled end 37. in enga gement-f 'with'the rack 18', and a pivoted weight 38 curved openings 20 and 2l therein behind are oppositelypositioned,so that while one which the racks 17 and '18 respectively are located. On the upper end of the plate 19,

a bracket 22 is fixed, and pivotally supports."

a locking-pawl '23. This pawl-23is'of'inverted U-shape, and is provided on one of its legs with a beveled lug 24: whichengages rack'l7, serving to lock the said rack against upward movement. The other leg of the pawl 23, has a beveled end 25 to be engaged by'thelever 9 whenlthe' latter moves upwardly to draw the pawl 23 out of locked engagement with rack 17.

A pivotedweight 26,supporte d on bracket 22,normally holds the pawl 23 in its operativeposition. on frame 4, .a bracket 27 is located and pivotally supports a ll-shaped locking pawl 28. This pawl 28 corresponds in shape to'the pawl 22, except that its position is i reversed and its beveled lug 29 engages the rack 18 and normally holds the rack against downward movement. j

The beveled end 30 of the pawl 28. is engaged by the lever 9 on the downward movement of the latter to force the pawl out of .locked engagement with the rack, and a pivoted weight 31 supported by bracket 27 normally holds the pawl in its operative position.

A block 32 is secured to lever 9, and this block 32 pivotally supportstwo ratchet dogs 33 and 3a respectively. The ratchet dog 33 has its beveled end 36 in engagement with rack 17, and its weighted end 7 holds the dog in this position. The ratchet normally holds the dog in engagement with theraek.

It'w1ll be. noted that the dogs 33 and 34 of them looks with the. rack when moving 1 upwardly, the other-one will'ride freely over 'tially horizontal and thevlever 9 will be in its rack and vice versa.

The operation isfas follows; The screw 15 is loosened sothat the rod 12 is free toslide in the yoke; When the thermostat within the incubator assums a position in accordance with the temperature. desired,

the screw 15 is tightened to clamp therod. The parts will then be in a normal position,

that is, both levers 8 and 9 will besubstanthe position shown in the drawings. If

the temperature within the incubator falls below normal, rod 12 will move downwardly. This'will cause lever 9 to move, and compel the rear endof thelever tomove upwardly. The lever 9 will first engage the beveled surface 25 of locking pawl 23, and swing this locking pawl out of locked position with rack 17." At the same time, thedog'3l will be in locked engagement with the rack 18 and will cause the block 16 and the rear end of leverl9 to move upwardly, thereby I 'of the block 16 0e mostat' ceases to contract.

. tion. During this downward movement, I low-the normalhorizontal position ofthe 35 normally lowering thedamper3 and causing the temperature within the incubator to rise. When the block 16 iselevated by means of the dog {34, the locking pawl 28" will ride freely over the teeth of rack 18, and whiledog 33 was in locked engagement with its rack, it will be 1noved out of such engagementby move, butremains in its position. The ex-: PELIlSlOIl of thethermostat, however, causes the rear-end of lever 9 to move downwardly, but any movement of lever 8 is prevented because locking pawl 28 will hold the block 16 against downward movement, and the dog 33 is held out of contactwith its rack until the block 32 lowers to a' position to: allow the lug 36 to swing into theopening 20. After the lever 9 reaches'its normal horizontal position, if the thermostat con- 33 willlock with its rack 17 while looking pawl 28 will be moved out of locking positinues to expand, this rear end of the lever will continue to move downwardly and dog lever, the-dog 34ewill ride against the outer surface of plate 19, hence particularattention is called to the shapes; of the combinations 20 andx2l, which allow the locking 7 :pawls 23 and 28 to engage the respective racks after the dogs have been forced out of contact by reason of engagement with the outer surface of platel9. I In" other words,

. the dog 34 is held out of operation, while- .7

the lever 9 moves from its normal horizontal to such, position. 7 Thedog 33 is maintained out ofoperation by contactwithplate19,

' position downwardly, and until it returns.

while the lever 9 moves from its normal horizontal position upwardly and returns to horizontal position. The end walls of the openings'20 and 21' are beveled asclearly shown at 39 to cause thedogs 33 and 34/00 ride readily into and out ofopenings 20 and 21. By reason of this arrangement of parts, the damper remains where it is placed'until .the parts return to normal and move past normal position. .,For example, 1f the nor-;

mal temperature in the incubator is 103, and

it falls to 101, the damper will be movedto a V position to cause the temperature to rise and will remain in th1s position until after the temperature has reached 103 and begun to go higher. During the time the temperature rises from 101 to 103, the damper will be.

absolutely stationary. i There can therefore 7 be no quick fluctuationsin temperature a pair of ratchet racks supported bythe WhileI have described my improvements in connection with an incubator, 1t is to be understood that the same might be used with anytemperature regulating means for the I control of thedamper orother device which regulates the raising ,and lowering of the temperature,

incubators, nor to any particular 'tempera-' ture controlling means, nor do I limit :my-

. selfto the particular details of construction set forth, but consider myself at libertyto 7 make. such changes and alterations as fairly fa'llgwithinthe spirit and scope of the appended claims. I v I I Having thus described my lnvention, what I claim as new and desire to secure by Letterjs Patent is:

1 A damper controlling mechanism, com- 'prising two movable members, one-member adapted to be connected to a damper, and

the othermember to a thermostat, andflmeans permittingv the thermostat-controlled member on its initial movement in both directions to move independently. of the damperconnected member and during the remainder of its movement in both directions tomove the damper-connected. member therewith,

substantially as described. I A

2. A damper controllingmechanism, comprising a damper lever, a secondleveradapted to be moved by a thermostat, and ratchet means connecting the levers, said ratchet means permitting the thermostat; controlled lever on its initial movement in bothdirections to move independently of the. damper lever, and during the remainder of its movement in both directions to move the damper lever therewith, substantially as described. I 3. A damper controllingmechanism;com-

prising a damper supporting lever, a lever adapted to bem'oved by athermostat, and

ratchet mechanism connecting the levers.

whereby a portion of themovement of the last-mentioned lever is imparted to the firstmentioned lever, substantially as described.

' prising a v 4.; A damper controlling mechanism, comdamper supporting lever, a second lever adapted to be moved; by a thermostat,

" a pair oflratchet ,racks, supportedlby the first-. mentionedlever, ratchet dogs. carried ..by the I last-mentioned lever and) engaging the racks, locking-pawls engaging: the racks,

said lever adapted to move the locking pawls I out of engagement with the racks,-and said dogs adapted to cause the movement of the racks when the last-mentioned lever is moved by the thermostat, substantially as described.

5. A damper controlling mechanism, comprising a damper supporting lever, a second lever adapted to bemoved. by a thermostat,

and I do not limit myself to.

' out'ofengagement with. its rack when the first-mentioned lever, ratchet dogs carried" by the last-mentioned lever and engaging theracks, locking pawls engaging the racks,

said lever adapted-tomove the locking pawls. I

lever is movedin the opposite direction, substantially as described. 1 w

6. .Av damper controllingmechanism, comprising a damper supportinglever, a second leveradapted to be moved by a thermostat, a

pair of ratchet racks supported by the first mentioned lever, ratchet dogs carried by the last-mentioned lever and engaging the racks,

' locking pawls .engaging'the-racks, said lever adaptedto move the lock-ing pawls outofv engagement with the racks, and said dogs adapted-to-ca-use the movement of the racks I when the last-mentioned lever is moved by the thermostat, and said dogs and pawls having weighted portions normally holding them in'position to engage the racks, substantially' as described.

7. A damper controlling mechanism, comprising a dampersupporting lever, a second lever adapted to be moved by a thermostat, a pair of ratchet racks supported by the first-mentioned lever, ratchet dogs carried by the last-mentioned lever and engaging the racks, locking pawls engaging the racks,

said lever adapted to move the locking pawls out of engagement with the racks, and said dogs adapted to cause the movement of the racks whenthe' last-mentioned lever 'is movedby the thermostat, and a plate adapted to hold one ofthe locking dogs out of engagementwith its rack when the lever is moved in one direction and to hold the other dog out of engagement with its rack.

when the lever is moved in the opposite direction, and said-dogs and pawls having weighted portions normally holding them in" position to engage the-racks, substantially 1 as described.

8. A damper controlling mechanism comprising a damper lever, a second lever adapted to be moved by a thermostat, means compelling the first-mentioned lever to be moved by the last-mentioned lever during a portion I only of the movement of said last-mentioned lever, a yoke supported on the thermostat operated lever and having an opening therethrough, a rod projected through said open-j ing and adapted to be connected to a thermostat, and a set screw in said yoke engaging the rod, substantially as described.

9. A damper controlling mechanism, comprising a damper supporting lever, a lever adapted to be moved by a thermostat, ratchet mechanism connecting the levers whereby a. portion of the movement of thelast-mentioned lever is imparted to the first-mentioned lever, a yoke supported on the thermostat operated lever and having an opening therethrough, a rod projected through. said opening and adapted to be connected to'a thermostat, and a set screw in said yoke'engaging the rod, substantially as described.

10. A damper controlling mechanism, comprising a damper supporting lever, asecond lever adapted to be moved by a thermostat, a pair of ratchet racks supported by the first-mentioned lever, ratchet dogs/carried by the last-mentioned .lever and engaging the racks, locking pawls engaging the racks, said lever adaptedto move the locking pawls out of engagement with the racks, said dogs adapted to cause the movement of the racks when the last-mentioned lever is moved by the thermostat, a yoke supported on the thermostat operated lever and having an opening therethrough, a rod projected through said opening and adapted to be connected to a thermostat, and a set screw in said yoke engaging the rod, substantially as described. v 11. A damper controlling mechanism, comprising a damper supporting lever, a second lever adapted to be moved by a thermostat, a pair of ratchetracks supported by the first-mentioned lever, ratchet dogs carried by the last-mentioned' lever and engaging the racks, locking pawls engaging the racks, said lever adapted to move the locking pawls out of engagement with the racks, and said dogs adapted tocause the movement of the racks when the last-mentioned lever is moved by the thermostat, a plate adapted to hold one of the locking dogs out of engagement with its rack when the lever is moved in one direction and to hold the other dog out of engagement with its rack when the .lever'is moved in the opposite "direction, a yoke supportedon the thermostat operated lever and having an opening therethrough,

a rod'projected through said opening and adapted to be connected to a thermostat, and a set screw ins-aid yoke engaging the rod, substantially as described.

12. A damper controlling mechanism, comprising a damper supporting lever, a second lever adapted to'be moved by a thermostat, a pair of ratchet racks supported by the first-mentioned lever, ratchet dogs carried by the last-mentioned lever and engaging the racks, locking said lever'adapted to move the locking pawls out of engagement with the racks, and said dogs adapted to cause the movement of the racks Whenthe last-mentioned lever is moved by the thermostat, said dogs and pawls having Weighted portions normally holding them in position to engage the racks, a yoke supported on'thethermostat operated lever pawls engaging the racks,

projected through said opening and adapt ed to be connected to a thermostat, and a set screw in said yoke engaging the rod, substantially as described.

13. A damper controlling mechanism, comprisinga dampersupporting lever, a second lever adapted to be moved by a thermostat,

a pair of ratchet-racks supported by the first-mentioned lever, ratchet dogs carried by the last-mentioned lever and engaging the racks, locking pawls engaging the racks,

said lever adapted to move the locking pawls out of engagement with the racks, and said dogs adapted to cause the movement of the racks when the last-mentioned lever is moved by the thermostat, a plate adapted tohold one of the locking dogs out of engagement with its rack when the lever is moved in one direction and to hold the-other-dog out of engagement with its rack when the lever is moved in the opposite direction, said dogs and pawls having weighted portions normally holding themin position to engage the-racks, a yoke supported on the thermostat operatedlever and having an opening and havingan opening therethrough, a rod therethrough, a rod projected through said 'endson the frame, one of'said levers adapt,-

ed to support a damper, the other ofsaid i leversadapted to be connected to a thermostat, a block on the damper supporting lever having two curved oppositely arranged ratchet racks on one vface with the racks -eX- posed throughthe openings in the plate,

lockingpawls on the plate and frame respectively engaging the racks, and pivoted dogs on the last-mentioned lever engaging the racks, said last-mentioned lever adapted to control the operation of the pawls, and said plate controlling the operation of the dogs, whereby the levers are caused to inove together during a movement in one direction, and the lEISt-IllIltIOIlGCl lever is permitted to move independently in its return} a movement, substantially as described.

15. A damper controlling mechanism com- 7 1 prising a damper supporting lever, a second lever adapted to be movedby a thermostat,

a pair of ratchet racks supported by the,

first-mentioned lever,'ratchet dogs carried by the last-mentioned lever and engaging the racks, locking pawls engaging theracks,

a plate having openings therein for the en- 'gagement of the dogs with the racks, said plate adapted to hold one of the dogs out of engagement with its rack during the movement of the lever in'one di-rectioir'aml the other dog out of engagement with its rack during the opposite 'movemen said lever adapted to move the locking pawls 1;

out of engagement with the 1- dogs adapted. to cause'the 1110 5 racks when the last-mentioned lever is moved by the thermostat, substantiall In testimony whereof I have signed my Cdpies of this patent may be obtained for t of the lever, name to this specification in the presence of WO subscribing Witnesses.

HARRY WILGU S. 

